Brush.



F. P. CHAPIN.

BRUSH,

APPLICATION FILED JUNE 16. 19.15.

Pamntefi May 16, 1916.

lifim.

ATTORNEYS.

WITNESS up 3 l BRUSH r specification of Letters Patent.

"Pa-tented May in, rare.

Application filed June 16, 1915. Serial No. 34,409. V

To all whom it m (lg/concern Be it known that I, FREDERICK P. CHAPIN,

a citizen of the United States of America,

residing in the city of Springfield, county 5 of Hampden, and State of Massachusetts,

have invented certain new and useful Improvements in Brushes, of which the following is a specification.

This invention relates to improvements of brushes and, in particular, to a web of bristles of improved construction, from which brushes of various shapes and sizes may be made.

I am aware that brushes of the class described, have been used, heretofore, and that webs of bristles, for use subsequently in brush construction, are shown in the prior art in various forms. One construction, which I seek to improve by my invention, is shown in Letters Patent No. 642,484 granted Jan. 30, 1900 to A. F. Phillips. In this patent, bristles are laid between two tapes, which extend centrally of the bristles and at right angles thereto. These ta es are stitched together and the web, thus formed, is thereafter folded upon its longitudinal center line, whereby the bristles are bent upon themselves. The foldedtapes are then stitched together and the web is ready for subsequent steps, which include dipping the folded portion of the web in pitch. The purpose of the pitch is to bind the bristles one to another so that they can not readily be loosened, removed or displaced from the brush. However, the folded Web of Phillips has two fabric tapes folded around and entirely inclosing the bristles so that pitch, in order to accomplish the purpose stated above, must soak through the tapes before it is available effectually to bind the hp-istles. Pitch does not readily seep thro gh the tapes and only a small amount of that applied to the tapes enters to the bristles. Furthermore, before the web can be made up into a brush it must be thoroughly dried. Draining and drying operations are retarded with the structure in the patent above mentioned by the tapes in the same degree as its entrance to the bristles is retarded. Another disadvantage incident to the method described is that the two tapes are bent as well as the bristles themselves, which makes a bulging, bulky fold. This fold, although subsequently pressed, has a tendency to bulge and does not form a flat thin fold, which is desirable if the largest into a brush. A suitable number of th number of bristlesare to be applied within a given space. By this invention, ll seek to provide an improved construction for a web of bristles-and to eliminate the disad-f vantageous features in the construction above described.

An object of the invention is to provide an improved formation for a web of brie tles wherein the web of bristles is so assembled and folded as to produce a fiat, thin and compact fold.

Another objectof the invention is to provide an improved formationfor a web of bristles wherein the bristles are exposed at their folded portions to permit thorough permeation of the bristles by pitch and to permit rapid drying and draining of the pitch from the bristles.

With these objects in view apreferred 7 embodiment of my invention is shown for illustrative purposes, in the accompanying drawings, in which- Figure 1 is a fragmentary perspective. view illustrative of the first step in the manufacture of the web; fig. 2 is a tragmentary perspective view illustrative of the second step; Fig. 3 is a perspective view on an enlarged scale of a portion of Fig. 2; and Fig. l-is a nelevational view showing the web of bristles assembled on a drum to form a rotary brush.

eferring to these drawings; 1. represent bristles or hair stock which is to he form ll-ii bristles of approximately equalllength a laid upon and substantially at right angles to a pair of spaced parallel tapes 2. The bristles are laid in parallel and closely ad jacent relation and preferablyseveral la of bristles l are ap lied 'one upon anoth to form a web of sut'cient thickness. [at the formation of the web of bristlesias described a second pair of spaced parallel tapes 3 are laid upon the bristles in such a manner that they lie directly over and in substantially parallel relation with the tapes 3. Each tape 3 is then secured to the tape 2 thereunder by one or more rows of stitching as indicated at -.l. in this manner the bristlesl are held iirrnlvbetween two pairs of tapes, each pair being spaced one from the other for a purpose later to be described. The webs 1 may. of course, be made of any length desired. The next step in the manufacture the brush consists in folding; the web upon its longitudinal center line, which ill) lies between the spaced tapes, and Fig. .2 shows'the web so folded. The manner of folding the web, shown in Fig. 2 and more clearly in Fig. 3 brings the four tapes one above another with the two tapes 3 in contiguous relation. The four tapes are then secured together by two more rows of stitching as indicated at 5. It will be seen that all of the bristles l have been bent upon themselves leaving'a short portion 6 extend ing beyond the tapes, wherein the bend is "made. This exposed portion 6 of the bristles is then dipped into pitch, or any other suitable material, andnext drained and allowed to dry. The folded web is then ready tobe applied on suitable forms in any desired mann'er'to form a finished brush. This last step is accomplished in the usual manner and is aided by my invention. The web,

'The web may, however, be applied in any other manner desired to form a brush, since the invention is concerned pr marily with the formation of the web itself.

It is particularly to be noted that the folded portion of the web does not include the fabric tapes? andB on account of the use of two spaced tapes on either side of the bristles as against a single tape. The inclusion of the tapes into the folded portion of the web necessarily means a bulgy fold in which 'ther'eis less tendency for the web to remain flat even if pressed. By the use'of spaced tapes, however, the only part folded is the bristles, which readily remain flat between the tapes thus producing a web having a Hat and very thin fold. When such a web is 'Wound upon a core 7 as indicated in Fig. 4,

.it is possible to obtain a great many more bristles within the space indicated by the is also materially accelerated when the bristles are freely exposed as against the slow draining and drying, which occurs when the tapes are included in the fold and surround the bristles. Thus, I have provided an improved construction for a web of bristles suitable for brush manufacture whereby a stronger bond between the bristles isobtained, the time necessary for making the web is reduced and the finished brush contains a maximum number of bristles in a given area. It is recognized that various modifications may be made in the construction above described without departing from the scope of my invention which is defined in the appended claim.

What I claim is A web of bristles for a brush, comprising, afolded layer of bristles, tapes on the outside and other tapes between the folds of said layer, the latter tapes being in contiguous relation, all of said tapes'bein'g stitched together and arranged one above another in parallel and spaced relationvwith respect to the line of fold of said layer, whereby a flat, thin fold for the web is provi dedi FREDERICK P. OHAPIN. 

